Electrically-heated burnishing machine



F. E. BOOTHROYD. ELECTRICALLY HEATED suamsnma MACHINE.

APPLICATION FILED MAY 2, I921.

Patented Mar. 21, 1922 flvvavmq UNITED ST PATENT F E FRANK n. Boo'rrmoYnor BEVERLY, iviassncnusa'r'rs, rissisnonro 'omrnnsnon MACHINERY CORPORATION, or iriernnsomjnnwrnnsnr, A oonro m'r on or'nnw JERSEY.

' ELECTRICAILLY-HEATED 'BUBZNIS-I-IING MACHINE.

1,410,053. p e in rnment- Patented Mar. 21, 1922.

' Application filed Ma -2,1921. seriai no. 465,955. T all whom "it may concern illustration andshown in the accompanying Beit known that I, FRANK E. iBoo'rnRoYn, drawings in which; 1 p -'a citlzen of the United States, residing at Fig. *1 us'a sile elevation, partiy in :sec- Beverly, in the county of Essex and State of $1011,Of tllG DTRClHIiG. 1

5 Massachusetts, have invented certain "Inn 'Fig.-2 is a diagrammatic sketcl1of".the"-60 provements'in Electrically-Heated Burnislr oscillating mechanismyand a V 1 ing Machines, of which the following de Fig. 3 is a plan viewbf the connecting scription, in-connection with the accompanyleads. y ing drawings, is a specification, like ref- The machine shownis the ordinary Ross eren'ce characters onthe drawing indicating Meyer edge setter substantially such as is 65 like parts in-the several figures." disclosed, for example,:in United iStatesiLet- This'invention refers to electrically op- *ters Patent No. 3683853, granted Aug. '23, erated'machines'andiis disclosed in'connec- 1887, on application of '55. Ross. It-com- 'tion with an electrically heated edge :setting prises a rotary "shaft 10 carrying a wrist machine for burnishi'ng the sole edges of pin 12 which causes-a-pitman l i to oscil-yflo boots and shoes. In machines having-movl'ate horizontally. The pitmanis pivoted'at ing tools which it is desired to heatntheiuse 16 to a vertical arm 18 carrying the edge ofelectricity for heating purposes has been' --setting tool'QOvat itslow'er. end. The 211111 foundto ipresent'certaindisadvantages-ow- 18 carries'an arc-shaped member-22 having 2 'ing to'the difficulty of conveyingithe heatto its center substantially'atthe working fac'ec'lfi the moving tool in case theheating unit is of'the tool20 and this .arcx-shaped-member located upon the frame'of the machine and 22eengages a flat ledge2imountedfixedly to the difficulty of conveying current to the upon the frame of-the machineybeing'held unit in case it is located on the IIlOViIlg tool in contact therewith by a :suitable' spring. 25 carrier in close; )roximity to the-tool, since The rolling. of the are 22 upon the surface 8 the consequent rapid movement of thenmit 24: causesithe'toolfiO tomovesubstantially has I a tendency to "cause deterioration and horizontally instead of in the arcofaacircle, destruction in the leads which carry'the All of" the foregoing structurezisishown in current from the frame'to the'unit, whether the patent above referre'd'ato and need not these leads be continuous in form or :be further.described.

whether theycomprise moving contacts- I v The arm =18atitslowerendis provided have found that electricity can be y conwith a holder 26, in which is mounted a ducted successfully to a moving :part by spindle carrying two tools, 20 at its lower means of spiral springs with their axes subend. These tools can be interchanged by stantially straight and preferably in a state means of the handle28, as is well under-' 90 of compression. These springs are made stood. One tool is used on the shank and stiff enough so that their own weight or the other upon the forepartof the shoe. An

inertia has no appreciable effect upon their electricheating unit is mounted in a casingbehavior, and the only movement which they 30 placed in any convenient location adjaevidence is due to the movement of the part cent to the tools upon the holder 26. This 96 to which they are connected. Accordingly unit is supplied by leads 32 with current an important feature of the invention conpassing through a Suitable rheostat 34, and sists in a lead comprising a spiral spring it is to the transference of the current from extending between the fixed frame of-a mathe fixed frame of the machine to the movchine and the moving tool carrier to which mg casing 30 that the principal features of 100 it is desired to convey electrical energy. this invention are directed. The leads 32" This spring is preferably mounted in two pass to terminal blocks 36 mounted upon sockets and held there simply by a certain the oscillating arm 18. Opposite these compression sufficient to hold it firmly in blocks on the fixed frame of the machine 50 lac are a second pair of terminal blocks 38 to This and other features of the invention, which the leads coming from the rheostat 34; comprising certain combinations and (LT-l are attached. Compressed between correrangements of parts will be understood from sponding' members of these pairs of termithe following description of a preferred emnal blocks are two spiral springs 40. The 55 bodiment thereof selected for purposes of terminal blocks are mounted in sockets in two insulation blocks 42 and 44 and the ends of the springs are also mounted in these .sock'ets resting against the terminal blocks 7 as shown in Fig. 3. As the tool is vibrated, the block 44, which is mounted upon the arm 18, is vibrated with it and the corre-r.

sponding ends of the springs move in the same way. The ends of the Springs which are mounted. in the block 42 remain motionattachment, their length is not great as com pared with their diameter, and they are stifi enough so that they do not bend appreciably under their own weight, and they have no tendency to vibrate or slap around because of their own inertia.

Having described my invention, What I claim as new and desire to secure by Letters Patent of the United States is 1. In a machine of the class described, a vibrating tool holder, a tool on said holder, an electric. heating unit on the'holder in convenient heat conducting relation to. said.

tool and a lead for said unit comprising a spiral spring of substantially straight axis "extending'between said moving holder and the fixed frame'of the machine.

2. In a machine of the class described, a moving tool, an oscillating tool holder, a. tool on said holder, an electric unit on the holder inconvenientheat conducting relation to said tool, and a conducting lead for said unit comprising a spiral spring extending between said oscillating holderand an heat conducting relation to said tool upon said holder, a portion of said holder extending into close juxtaposition with the fixed frame of the machine, and a spiral spring under compression having a substantially straight axis with one end mounted onthe frame and the other mounted upon the holder at these points respectively, for conducting electric energy to the unit.

4. In a machine of the class describechan oscillating tool holder, a too]. on said holder, an electric unit 011 the holder in convenient heat conducting relation to said tool on said J holder, a block having a socket mounted on the frame of the machine, a similar block having a similar and registering socket mounted upon the oscillating holder opposite the first named block, and a under compression mounted with its ends in said sockets for conducting electric energy to the oscillating unit and leads passing from the ends of said spring to the unitand to a suitable source of energy, l

In a machine of the class described, an oscillating tool holder, an electric unit on the holder for heating the tools onthe holder, and a spiral spring lead for the unit spiral springrespectively."

extending from the fixed frame of the ma- In testimony whereof I have signed my name to this specification.

FRANK E. BOOTHROYD. 

